Question: A 4 cylinder, 4 stroke diesel engine develops 8 3 . 5 kW at 1 8 0 0 rpm with specific fuel consumption of 0

A 4 cylinder, 4 stroke diesel engine develops 83.5 kW at 1800 rpm with specific fuel consumption of 0.231 kg/kWh, and air/fuel ration of 23:1. The analysis of fuel is 87% carbon and 13% hydrogen, and the calorific value of the fuel is 43.5 MJ/kg. The jacket water cooling flows at 0.246 kg/s and its temperature rise is 50 K. The exhaust temperature is 3160C. Draw up an energy balance for the engine. Take R=0.302 kJ/kg and Cp is 1.09 kJ/kg K for the dry exhaust gases and Cp is 1.86 kJ/kgK for super heated steam. The temperature in the test house is 17.80C, and the exhaust gas pressure is 1.013 bar.

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